linux-kernel - Re: [RFC PATCH 0/5] Add CONFIG symbol as module attribute

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Date:   Thu, 25 Aug 2016 10:00:20 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     Christoph Hellwig <hch@....de>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     Cristina Moraru <cristina.moraru09@...il.com>,
        "vegard.nossum@...il.com" <vegard.nossum@...il.com>,
        Valentin Rothberg <valentinrothberg@...il.com>,
        Hannes Reinecke <hare@...e.de>,
        Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <mmarek@...e.com>, linux-kernel@...r.kernel.org,
        teg@...m.no, kay@...y.org, rusty@...tcorp.com.au,
        akpm@...ux-foundation.org, backports@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "rafael.j.wysocki" <rafael.j.wysocki@...el.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Takashi Iwai <tiwai@...e.de>,
        Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Paul Bolle <pebolle@...cali.nl>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Sathya Prakash Veerichetty <sathya.prakash@...adcom.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Laurence Oberman <loberman@...hat.com>,
        Johannes Thumshirn <jthumshirn@...e.de>,
        Tejun Heo <tj@...nel.org>,
        Jej B <James.Bottomley@...senpartnership.com>,
        Theodore Ts'o <tytso@....edu>, danijons@...dent.chalmers.se,
        Andrzej Wasowski <wasowski@....dk>
Subject: Re: [RFC PATCH 0/5] Add CONFIG symbol as module attribute


> The other nice thing is that we could probably fold most of the
> Makefiles into Kconfig using that methods as well, by listing the
> objectes required for a module, e.g.
> 
> module NVME_TARGET
> 	tristate "NVMe Target support"
> 	depends on BLOCK
> 	depends on CONFIGFS_FS
> 	name nvmet
> 	objects core.o configfs.o admin-cmd.o io-cmd.o fabrics-cmd.o
> 	objects discovery.o
> 

If this was going to be a thing, then you might also have

config NVME_TARGET_FOO
	bool "NVMe target supports FOO"
	module NVME_TARGET
	objects foo.o

The "module" would be like a "depends on" plus giving the module for
generating the Makefile, and now you can really remove most Makefile
stuff... :)

johannes